(Y/n) lived with Finn and Jake doing whatever they can. But when Princess Bubblegum sends them to a quest to shut down a 'dangerous' portal, (Y/n) is pushed in and put into what seems like the same place. Stuck in the forest and walking for what seems like forever, she hears music playing and sees what looks like Finn but only...female? Then she spots the bad little boy

"Y/n, it's okay if you don't like me back, I just want to tell you what I truly feel about you. Will you stay by my side?" Marco never knew that Star Butterfly would have a sister back in Mewni. And he DEFINITELY didn't expect that she would pay them a visit. Chaos and confusion ensues as they try to go through their ups and downs- mostly downs. Jackie Lynn Thomas gets a LITTLE crazy, while Tom and Janna are just vibing in their corner. *** - marco diaz x fem!reader ☆ she/her pronouns ☆ slightly canon compliant ☆ SUPER UNEDITED. published: August 25, 2016 ended: August 7, 2017